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Finding the Fourth Proportional to 124,443.10, 186,664.65 and 74,676.70

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Solution

The fourth proportional to 124,443.10, 186,664.65 and 74,676.70 is: 112,015.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,443.10 : 186,664.65 = 74,676.70 : x
  2. Step 2: Convert to fraction form
    124,443.10/186,664.65 = 74,676.70/x
  3. Step 3: Cross multiply
    124,443.10x = 186,664.65 × 74,676.70
  4. Step 4: Simplify right side
    124,443.10x = 13,939,500,068.66
  5. Step 5: Solve for x
    x = 13,939,500,068.66/124,443.10
  6. Step 6: Final answer
    x = 112,015.05

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.